adding the some preliminary junk

[gitmo/Class-C3-XS.git] / t / 02_MRO.t

diff --git a/t/02_MRO.t b/t/02_MRO.t
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+++ b/t/02_MRO.t
@@ -0,0 +1,136 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More tests => 15;
+
+BEGIN {
+    use_ok('Class::C3');
+    # uncomment this line, and re-run the
+    # test to see the normal p5 dispatch order
+    #$Class::C3::TURN_OFF_C3 = 1;    
+}
+
+=pod
+
+This example is take from: http://www.python.org/2.3/mro.html
+
+"My first example"
+class O: pass
+class F(O): pass
+class E(O): pass
+class D(O): pass
+class C(D,F): pass
+class B(D,E): pass
+class A(B,C): pass
+
+
+                          6
+                         ---
+Level 3                 | O |                  (more general)
+                      /  ---  \
+                     /    |    \                      |
+                    /     |     \                     |
+                   /      |      \                    |
+                  ---    ---    ---                   |
+Level 2        3 | D | 4| E |  | F | 5                |
+                  ---    ---    ---                   |
+                   \  \ _ /       |                   |
+                    \    / \ _    |                   |
+                     \  /      \  |                   |
+                      ---      ---                    |
+Level 1            1 | B |    | C | 2                 |
+                      ---      ---                    |
+                        \      /                      |
+                         \    /                      \ /
+                           ---
+Level 0                 0 | A |                (more specialized)
+                           ---
+
+=cut
+
+{
+    package Test::O;
+    use Class::C3; 
+    
+    package Test::F;   
+    use Class::C3;  
+    use base 'Test::O';        
+    
+    package Test::E;
+    use base 'Test::O';    
+    use Class::C3;     
+    
+    sub C_or_E { 'Test::E' }
+
+    package Test::D;
+    use Class::C3; 
+    use base 'Test::O';     
+    
+    sub C_or_D { 'Test::D' }       
+      
+    package Test::C;
+    use base ('Test::D', 'Test::F');
+    use Class::C3; 
+    
+    sub C_or_D { 'Test::C' }
+    sub C_or_E { 'Test::C' }    
+        
+    package Test::B;    
+    use Class::C3; 
+    use base ('Test::D', 'Test::E');    
+        
+    package Test::A;    
+    use base ('Test::B', 'Test::C');
+    use Class::C3;    
+}
+
+Class::C3::initialize();
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::F') ],
+    [ qw(Test::F Test::O) ],
+    '... got the right MRO for Test::F');
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::E') ],
+    [ qw(Test::E Test::O) ],
+    '... got the right MRO for Test::E');    
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::D') ],
+    [ qw(Test::D Test::O) ],
+    '... got the right MRO for Test::D');       
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::C') ],
+    [ qw(Test::C Test::D Test::F Test::O) ],
+    '... got the right MRO for Test::C'); 
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::B') ],
+    [ qw(Test::B Test::D Test::E Test::O) ],
+    '... got the right MRO for Test::B');     
+
+is_deeply(
+    [ Class::C3::calculateMRO('Test::A') ],
+    [ qw(Test::A Test::B Test::C Test::D Test::E Test::F Test::O) ],
+    '... got the right MRO for Test::A');  
+    
+is(Test::A->C_or_D, 'Test::C', '... got the expected method output');
+is(Test::A->can('C_or_D')->(), 'Test::C', '... can got the expected method output');
+
+is(Test::A->C_or_E, 'Test::C', '... got the expected method output');
+is(Test::A->can('C_or_E')->(), 'Test::C', '... can got the expected method output');
+
+# remove the C3
+Class::C3::uninitialize();
+
+is(Test::A->C_or_D, 'Test::D', '...  old method resolution has been restored');
+is(Test::A->can('C_or_D')->(), 'Test::D', '...  old can(method) resolution has been restored');
+
+is(Test::A->C_or_E, 'Test::E', '...  old method resolution has been restored');
+is(Test::A->can('C_or_E')->(), 'Test::E', '...  old can(method) resolution has been restored');
+
+    
\ No newline at end of file